Fix duplicated fields in DESCRIPTION

Author: fspecque

DESCRIPTION

@@ -98,6 +98,4 @@ VignetteBuilder: knitr
 Config/Needs/website: rmarkdown
 URL: https://github.com/cbib/Seurat-Integrate, https://cbib.github.io/Seurat-Integrate/
 BugReports: https://github.com/cbib/Seurat-Integrate/issues
-Remotes: github::satijalab/seurat-data
-Remotes: github::theislab/kBET
-Remotes: github::immunogenomics/LISI
+Remotes: github::satijalab/seurat-data, github::theislab/kBET, github::immunogenomics/LISI